37 lines
675 B
C
37 lines
675 B
C
#include <mc1322x.h>
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#include <types.h>
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volatile char u1_tx_buf[1024];
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volatile uint32_t u1_head, u1_tail;
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void uart1_isr(void) {
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while( *UART1_UTXCON != 0 ) {
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if (u1_head == u1_tail) {
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disable_irq(UART1);
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return;
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}
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*UART1_UDATA = u1_tx_buf[u1_tail];
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u1_tail++;
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if (u1_tail >= sizeof(u1_tx_buf))
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u1_tail = 0;
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}
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enable_irq(UART1);
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}
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void uart1_putc(char c) {
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uint32_t h = u1_head;
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h = u1_head + 1;
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if (h >= sizeof(u1_tx_buf))
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h = 0;
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if (h == u1_tail) /* drop chars when no room */
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return;
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u1_tx_buf[u1_head] = c;
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u1_head = h;
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uart1_isr();
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}
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uint8_t uart1_getc(void) {
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while(uart1_can_get() == 0) { continue; }
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return *UART1_UDATA;
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}
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